Pressure greasing apparatus



May 12, 1931. .1. w. WOODRUFF PRESSURE GREASING APPARATUS med Aug. 11, 1927 \M www mm mm 1w E h um, rf kb s 1 .z w

(NIM 1 l mm 15% nl@ 1% 1N ---1:11 ----:fm l E Patented Mayr l2, 1931 JSEPH W. WOODRUFF', @F IELIZBETH, NEW JERSEY Application med August 11., 1927. Serial No. 212,248. J

, rihis invention relates in general to pressure greasing apparatus, and more particularly to such apparatus including a reservoir for the grease Aand a manuallyoperated A 5 grease ejecting pump which communicates with said reservoir, whereby the grease may be ejected from the reservoir at high pressures, for example four thousand (41000) pounds. v

One object of the invention is to provide pressure greasin apparatus of the character described embo ying novel -and improved features of construction, whereby the grease may be, ejected at' said high pressures with a minimum of manual exertion by the operator.

Another object is to provide a novel and improved construction, combination and arrangement of arts, whereby a compact and easily handled) described composed of a minimum number of parts is produced.

Further objects are to provide such a' pressure greasing apparatus including novel and improved means for chargin the grease reservolr; to provide novel an improved means for constantly forcin the grease from said reservoir into the ejecting pump, said means also serving to actuate the pump on its return stroke, whereby the operator is relieved of the exertion necessary to force the grease 'from the reservoir to the pump and the actuation of the pump on its return stroke; to provide a strong and easily asadvantages and results as will be brought out by the following description.`

Referring to the accompanying drawings, in which corresponding vand like parts are designated throughout the several views by the same reference characters,

Figure 1 is a vertical longitudinal sectional view through a pressure greasing apparatus embodying my invention;

v tus and Figure 3 is a transverse vertical sectional view, taken on the line 3-3 of Figure 1. Specificallydescribing theillustrated em- 60 bodiment of the invention, the reference apparatus of the characterv sembled construction, and to obtain other A the nipple `11.

Figure 2 is a top plan view ofthe apparacharacter A designates the grease reservoir and B the ejectingfpump. The reservoir comprises a cylinder 1 to opposite ends of which are secured heads 2 and 3, said headsbeing preferably substantially square and V' bein connected by tie bolts 4, whereby` the hea s are iirmly secured to the cylinder. Extending longitudinally of the cylinder and centrally thereof is a pipe 5 having one end thereof screw threaded at 6 into one head of the cylinder, and the other end passing through an opening 7 in the opposite head 3. A jam nut .8 is threaded upon/the end of said pipe 5 projecting beyond the head 3 and is clamped tightly against said head. Said pipe 5 has transverse'ports 9 'communicating with its interior passage adjacent the inside of the head 3, and the extremity of the pipe 8 has secured therein an inwardly opening vspring closed check valve v 10 and a nipple 11 to which may be connected a hose or pipefor chargin the reservoir with grease. A packed plston 12is; slidable upon the`pipe 5 within the cylinder 1 and is normally influenced toward the head 3 by a heavy helical compression spring 13 interposed between the .piston and the head 2. The end of the pipe 5 opposite the check valve l10 is formed with `a valve seat 14 with which cooperates a needle valve 15 threaded at 16 in the head 2 and provided at its outer end with an operating handle 17.v This valve 15 serves to open and close the passage through the pipe 5. Y

In charging the reservoir the valve 15 is ,35, closed and a tube or hose is connected to Grease is then pumped bv any sultable means into the pipe 5 throug the transverse passages 9 and into the space between the piston 12 and the head 3. The 90 pressure is suiicient to compress the spring 13 as the grease enters the cylinder- The spring 13 is preferably1 of suficient strength to exert a pressure of for example two hundred (200) pounds, so that when the cylinder is fully charged the piston 12 and the spring 13 tend to force the grease through the pipe 5 toward the valve 15 under a high pressure.

Tle head 2 has an axial passagel 18 sur-*100 rounding the valve 15 and communicating with the passage in the pipe 5, and another passa e 19 which extends substantially radially t rough the head. The passage 19 leads to a pump cylinder 20 which may be cast integral with the head 2 and is disposed at substantially right angles to the passage 19, or parallel to the axis of the cylinder 1 with one end opening outwardly through a boss 200 on the head 2. Within the pump cylinder 20 is reciprocable a piston or plunger 21 having a packing cup 22 thereon, one end of said piston projecting outwardly from the open end of the cylinder and being pivotally connected at 23 to one end of a thrust link 24 the other end of which is pivotally` connected as at 25 to an operating lever 26. This operating lever preferably has one end 27 disposed at an angle to the body of the lever and its extremity pivotally connected as at 28 to the head 3 of the cylinder 1, so that the body or long arm of the lever may `be normally dis osed parallel to and in close iie cylinder 1. The pivotal.

proximity to t connection 25 is disposed in the bent end 27 closely adjacent the pivot 28, so as to obtain the most efficient leverage, or in other Words, to enable the greatest pressure to be exerted on' the piston 21 with a relatively small pressure on the body of the lever 26. The pump cylinder 20 is formed wlth an outlet 29 in substantial alinement with the inlet passage 19, andv a nipple 30 is connected to said outlet to whic may be connected a hose or the like 31 for conveying the grease to a desired point. The passage 19 is provided with a spring check valve 32 which closes in the direction away from the.

cylinder 20, while the outlet passage 29 has a spring check valve 33 which closes in the direction of said cylinder. A tie link or other suitable means 34 is provided for separably connecting the lever 26 to the link 24 to holdsaid lever in inoperative position alongside of the cylinder.

In operation of the apparatus, assuming.

the reservoir charged with grease, the tie link 34 is released from the lever 26 and the valve 15 is opened. The grease is then forced under pressure by the spring 13 and piston 12 through the passages 18 and 19 into the pump cylinder .20 behind the packing 22, this pressure forcing the piston 21 outwardly and swinging the lever- 26 into the dotted position shown in Fi ure 1. Movement of the` lever 26 in this direction and consequently movement of the piston 21, are limited by engagement of a Hat portion 35 on the pivoted end of the lever with the outside of the head 3. If the resistance to the flow of grease through the outlet hose 31 is less than the pressure exump cylinder 20 which ejects the greasel rom said cylinder behind the piston through the outlet passage 29 under an extremely hio'h pressure, for example four thousand @1000) pounds. It is necessary for the o erator to use less than one hundred pounds pressure on the lever 20 to accomplish this result. Upon release of the lever the pressure of the grease flowing from the reservoir'l acts upon the piston 2] to again swing the lever 26 outwardly into the dotted line position, whereupon the manual operation by the operator to eject the grease throu h the hose 31 may be repeated. P'refera ly the apparatus Fis set upon a floor near the machine to be lubril cated with the lever 26 uppermost, tht` square heads 3 holding the apparatus against rolling. In this position the o ratorl may actuate the lever 26 with his oot which is a less tiresome operation than that of swinging the lever 26 by hand. When it is desired to place the apparatus out of operation for any appreciable length of time, the valve l5 is closed which confines any possible leakage of the grease to the reservoir 1 and relieves thehose 31 from pressure.

In practice, a suitable control valve would be used at the extremity of the hose 31 for regulating the flow of grease therefrom, for example such a valve as shown in my copending application Serial No. 200,532, filed June 22, 1927. y

Preferably indicating means is provided for showin at all times the quantity of grease in t e reservoir. This means Ymay -comprise a tube 36 connected to the piston 12 and slidably engaging the inner `walls of the cylinder 1 on the same side of the iston as the spring 13, the free edge 37 o said tube cooperating with slots 38 in the wall of the cylinder 1 through which said ed e is visible. The edges of the slots on te exterior of the cylinder may be graduated as at 39 to indicate the amount of grease which is used on any particular operationl I am aware that t e general combination of a reservoir for grease and an ejecting pump is not new, but my particular construction above described has many results 'and' advantages not obtainable with the constructions heretofore known. However, the detail construction of my apparatus may be modied and changed by those skilled in the art without departing from the spirit or scope of the invention, and therefore I claims when construed in t e light of the prior art.

yLacasse Having' thus described the invention, what l claim is:

l. Apparatus of the character described, comprising a reservoir for grease including a cylinder having an outlet extending at substantially right angles to its axis at one end thereof, a manually operable pump including a cylinder disposed axially parallel to said cylinder at-one side thereof and having an inlet communicating with said outlet of the cylinder, said pump cylinder also having anloutletpassage, a piston reciprocable in V said pump cylinder, an operating lever havi long arm ing two angularly disposedarms of different lengths, means for pivotally connecting the outer end of the shorter arm to the end of said cylinder opposite said pump cylinder with the longer arm normally disposed substantially parallel to and adjacent said cylinder, and a link having one end pivotally connected to said piston and the other end articulated to the inner end of said short arm of said level' and disposed between said long arm of said lever and said cylinder.

2. Apparatus of the character described, comprising a reservoir for grease including a cylinder, a. pipe extending longitudinally thereof with one end projecting from one end of said cylinder, a piston slidable longitudinally of the cylinder, a spring for moving said piston toward the first-mentionedend of said cylinder, said pipe communicating with said cylinder between said end thereof and said piston, an outlet at the other end of said cylinder communicating with said pipe and extendino` at substantially right angles vto pump having a cylinder on the second-mentioned end of said reservoir cylinder substantially parallel with the axis of the cylinder at one side thereof and having an inlet communicating with said outletsof the cylinder, said pump cylinder also .having an outlet passage, a piston reciprocable in said pump cylinder, two angularly disposed arms of different lengths, means for pivotally connecting the outer end of the shorter arm lto the end `of said c linder opposite said pump cylinder with the longer arm normall disposed substantially parallel to and adjacent said cylinder, anda link having one end pivotally connected to said piston and the other end articulated to .the inner end of said short arm of said lever and disposed between said of said lever and said cylinder.

ratus for thecharacter described, comprislng a cylindrical reservoir for grease, a pipe extending longitudinally thereof with one end projectin from one end of the reservoir, a piston sli able longi- 3. App

tudinally ofthe reservoir, a spring for moving said piston toward the rst-mentioned end of said reservoir,

ing with said reservoir between said end an o eratln lever havin# said pipe eommunicatthereof and said piston, an outlet at the other end of said reservoir communicating with said pipe, and means for controlling flow of grease from said outlet, a pum including a cylinder formed on the end o said reservoir adjacent said outlet and having an inlet and a discharge passage, said inlet communieating directly with the outlet of said reservoir, a plunger Ireciprocablefwithin vsaid cylinder to force grease therefrom through said discharge passage,l a check valve for preventing liow of grease from said cylinder into said outlet, and means for moving said plunger in one direction to eject said grease, said pump inlet and said reservoir outlet being arranged at the working side of the pump plunger at all times and the pressure exerted by said spring pressed piston in the reservoir being o grease flowing from said reservoir to move said plunger in the other direction.

JOSEPH W. WOODRUFF.'

the axis of, the cylinder, a 

